Reduce your risk of collision with this fully integrated, Class-B AIS transponder - essential for navigating today’s busy shipping lanes and congested ports. Compact in size, lightweight, fully waterproof, with low power draw and featuring multiple connections, the NAIS 500 is ideal for networking with any HDS Carbon and HDS Gen3 systems. This NAIS-500 package comes with a NSPL500 antenna splitter and a GPS-500.